Flop: I'm in doubt to check/call or to bet against 3 opp. Now I think since UTG2 and MP2 are pretty loose, maybe check/call would be better. When MP2 raises me, I would fold because of FD, but since it's a minraise and he got me covered I decided to call it off.

For the reason that it's a freeplay and as well we have 2 opponents behind I sometimes even just Check/Fold it, we could already be against a bigger straight as 78 or whatsoever. But as you decided to bet then likely can as well Call and reevaluate on further streets, although I am not really big fan of drawing in freeplay pots and as well when there could easily be a bigger straight and of course flushdraw possible.